For someone (agent muɴ-; s agent maN-) to slice off the stem-area skin (theme) from a citrus fruit (loc ref -an) with a knife (inst i-), as described above.
Maphod un agāpan hi mahhun nan lubban ya un upa'an ta nalaka.
It is best to slice off the stem-area skin of grapefruit before peeling so it will be easy.